Warp stop motion



Dec. 13, 1927.

l. H. VERRY WARP STOP MOTION Filed June 11, 1926 Q .EH v WV a m j filmul ln Patented Dec. 13, 1927.

UNITED STATES PATENT OFFICE.

IRVING H. VERRY, or WORCESTER, MASSACHUSETTS, ASSIGNOR T CROMBTON &KNOWLES LOOM woRKs, or WORCESTER, MASSACHUSETTS, A CO PORATION OFmassacnusnrcrs.

Application filed June 11,

This invention relates to warp stop motions for loom-s and it isthe-principal object of the invention to provide a simple means todetect the location of a warp fault.

Varp stop motions generally comprise a large number of thin so-calleddrop wires each of which is supported on a warp thread of the loom andthere is usually provided some form of oscillating detector rod whichunder normal conditions is free to move but which is arrested by afallen drop wire when the corresponding thread is broken or becomesslack. l/Vhen there are a large number of these drop wires it is adifficult mat ter to locate the warp fault and it is a further object ofmy invention to provide readily accessible means for moving the detectorrods so as to produce a. slight deformation of the fallen drop wire tothe end that the same will be twisted laterally to disturb theneighboring drop wires and thus indicate the location of the warp fault.

My invention relates more particularly to the style of motion set forthin Patent No. 1,360,638 wherein there is disclosed a plurality ofnoncircular oscillating detector rods passing through slots in the upperends of the drop wires. The detectors are oscillated through a springactuated device. and when one of the drop wires falls the narrow portionof the slot surrounds the rod and prevents oscillation thereof, thisresultbeing accompanied by stopping of the loom. It is a more particularobject of my invention to oscillate the detector rods about their axesso'that slight twisting of the drop wires will disturb adjacent dropwires.

It is a still further object of my invention to operate my device inconnection with a usual partof the warp stop motion, the control beingmanual and being independent of the ordinary automatic actuation of themotion by the loom. By the use of my invention it is possible for aweaver to determine the location of the broken warp thread withouttouching any mechanical part of the loom such as would ordinarily beoiled. The practical result of this is that the weavers hands will notbe soiled and there will be no danger of oil coming in contact with thewarp threads from the operators hands. It is a further object of theinvention to provide a flexible cord or cable the forward end of whichis provided with a handle readily WARE STOP MOTION.

1926. Serial No. 115,358.

transversely of the detector rods and looking P in the same generaldirection as the corresponding parts in Fig. 1,

Fig. 3 is a fragmentary view in the direction of arrow 3, Fig.

Fig. 1 is a rear elevation of a portion of the drop wires and detectorrods showing the action of the twisted fallen drop wire in indicatingthe location of the warp fault, and

Fig. 5 is a detail rear elevation of portion of the warp stop motion.

Referring to Fig. l, I have shown a loomside on which one end of theusual bottom or cam shaft 11 is mounted ina bearing 12, said shaft beingprovided with a cam 13 to cooperate with a shoe 14 formed on lever 15pivoted at 16 to the loomside 10. A link 17 is connected as at 18 to therear end of the lever 15. The upper end of'the link 17fis pivoted as at19 to an arm 20 loosely mounted on a stud 21 fixed in an end member 22forming part of the stop motion.

I The end member 22 is adjustably secured on an L-shaped rod .23 one endof which is adjustable in a. member 24 as set forth in the aforesaidpatent. The opposite end of the stop motion is similarly supported so asto provide for various adjustments of the end members 22 with respect tothe loom.

Detecting rods 26 .of non-circular crosssection extend throughtheopenings 27 in drop wires 28, said openings being of sufficient width intheir lower portions to permit oscillation of the detectingrods 26therein but being narrow intheir upper portions so that a fallen dropwire engages the detectors and prevents oscillation thereof. Thedetector rods 26 are rotatably supported in the end members 22.

The rear end of lever is provided with a stud 29 through which extendsone end of a Ushaped rod 30 one end of which is connected as at 81 to anupwardly and rearwardly extending arm 33 of a lever 3 L pivoted on theend member 22 as shown in Figs. 1 and 5. There are several of saidlevers 341, one for each detector rod 26, and they are connectedtogether by a link 35. Collar 36 is secured to the long side of the rod30 to limit the lower end of the compression spring 37 which surroundssaid rod and presses against the stud 29. Knock-off lever 38 is alsopivoted on the stud 21 and is connected to a knock-off rod 39 effectiveto stop the loom.

Under normal operation with the bottom shaft 11 rotating the cam 13,lever 15, link 17, and lever 20 serve to move the upper end of the sorin37 downwardl b stud l e y y 29. The levers 0:: therefore rock tooscillate the rods 26, the latter belng un1nterrupted as all the dropwires are held in raised position. Nhen a warp fault occurs, however,either through a broken or slackened thread the corresponding drop wire28 will fall to some such a position as indicated at the left of Fig. 2,arresting oscillation of the associated detector 26 and as the lever 20is raised the spring 37 will be compressed without giving the usualdownward movement to the rod 30. By means of intermediate mechanism, notshown but clearly set forth in the aforesaid patent, the knock-off lever38 will be moved to the left to produce a 'lrnocking'off movement of therod 39. The

- matter thus far described is of common construction and may beconstructed and operated as set forth in said patent.

My improvements relate more particularly to the construction of a devicefor manually oscillating the detector rods independently of the cam 13and in carrying out my invention I pivot a lever to one of the sides ofthe loom as at 51 and project laterally therefrom a lifter finger 52extending under lever 20 and operatively connected to the rear end of aflexible cord or cable 53 by a hook 54 on the cable which engages a pin55 carried by the finger 52; The cable 53 is led over stationaryguides56 to the front part of the loom and is provided at the forward endthereof with a handle 57 Under normal conditions finger 52 is out of engagement with the lever 20, the auxiliary lever 50 resting 011 asupporting pin 58 se cured to the loomside. g

When a Warp fault occurs, as previously described, one of the drop wires28 will fall so that the narrow partof the slot thereof will receive oneof the detectors 26. The weaver may then pull down handle 57, moving thesame to the dotted line position,

thus raising the lever 20 to the dotted line position indicated inFig. 1. The result of this is to compress spring 87 and cause increasedturning pressure on all of the detectors 16. As a consequence the fallendrop wire will be deformed somewhat being forced against one of theguide bars 59 and twisted to some such position as indicated in Fig. 1,to move the neighboring drop wires and thus indicate the location of thewarp fault. The raising movement of lever 20 by the handle 57 is madepossible because lever 15 cooperates with a face cam and is thereforefree to be lifted from the cam independently of the position of thelatter. The weight of auxiliary lever 50 is such that the handle will beraised to the full line position indicated in Fig. 1 when released bythe weaver, thus returning the finger 52 to its'lowerinost posi tionwhere it will not interfere with the normal automatic operation of thewarp stop mot-ion.

From theforegoing it will be seen that I have provided a very simpledevice manually operable by the weaver to indicate the location of afallen drop wire, said device operating independently of the ordinaryactuating mechanism for the warp stop motion and being normally out ofcontact with the latter so as not to interfere with the proper operationthereof. It will further be noted that the devicev cooperates, with oneof the normally moving parts of the stop motion and is so constructed asto be applicable to stop motions at present in use inasmuch as no changeis made in the warp stop 1110131011 proper.

Having thus describedmy invention it will be apparent that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention, and I do not wishto be limited to the details herein disclosed but what'll claim is:

1. In a warp stop motion for looms having a bank of drop wires, a guidefor the drop wires, a regularly moving detector member to be engaged bya fallen drop wire, regularly moving means to give said detector memberan oscillating movement, and an auxiliary manually controlled device indpendent of the means to give the detector the same character of motionit normally receives from the means to twist a fallen drop wire againstthe guide to bend a portion thereof laterally against the neighboringdrop wires,

2. In a warp stop motion for looms having a bank of drop wires, a guidefor the drop wires, an oscillating detector to cooperate with the dropwires, means to give the detector a regularly oscillating movement, andan auxiliary device independent ofand normally disconnected from thewarp stop motion and manually operable to impart to the detector rod thesame character of motion said detector rod normally receives from themeans, whereby the latter will move a fallen drop wire against the guideto deflect the same laterally and disturb the position of ad jacent dropwires.

3. In a warp stop motion for looms having a bank of drop wires, a guidefor the drop wires, an oscillating detector rod to cooperate with thebanl: of drop wires, loom actuated means to give the roda regularoscillation, said means including a reciprocating lever operated by aface cam, and manually operable means to move the lever independent ofthe face cam to give the detector rod the same character of motion itnormally receives from the means to move a portion of fallen drop wireagainst the guide to cause deflection thereof to disturb the drop wiresadjacent the fallen drop wire.

l. In a warp stop motion for looms having a bank of drop wires, a guidefor the drop wires, an oscillating detector rod, a regularly moving facecam, a cam lever there for, a driven lever, operative connections between the levers, operative connections be tween the driven lever andthe detector rod to cause the latter to oscillate when the driven levermoves, and manually operable means cooperating with one of said leversto cause movement of the driven lever, such movement giving the detectorrod the same character of movement it normally receives from the meansto move a fallen drop wire against the guide and cause deformation ofthe fallen drop wire to disturb adjacent drop wires.

5. In a loom warp stop motion comprising a plurality of banks of dropwires, an oscillating detector rod for each bank passing throughopenings formed in the drop wires, means to connect said detector rodsoperatively together, a regularly moving lever to actuate all of saidrods and give the same an oscillating movement when said lever isvibrated, loom operated means to give the lever a regular vibration, aguide for the drop wires, and manually controlled means to give saidlever a vibration independent of the loom actuated means whereby whensaid manually controlled means is operated one of the detector rods willengage a fallen drop wire and twist the same against the guide to causelateral movement of a portion of the fallen drop wire with resultantdisturbance of adjacent drop wires.

In testimony whereof I have hereunto atfixed my signature.

IRVING H. VERRY.

